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Which is fastest? SATA III or RAID 0 SATA II

Tags:
  • NAS / RAID
  • SATA
  • Storage
Last response: in Storage
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September 27, 2010 8:05:04 PM

Guys... which is faster? the new sata 6gb/s is faster than two disks sata 3gb/s in raid 0? And three disk sata 3gb/s in raid 0? What is the breakpoint where sata 3gb in raid 0 is faster than one disk 6gb/s?

Can I do such a comparison?

More about : fastest sata iii raid sata

a b G Storage
September 28, 2010 5:31:50 AM

jsmith432 said:
Guys... which is faster? the new sata 6gb/s is faster than two disks sata 3gb/s in raid 0? And three disk sata 3gb/s in raid 0? What is the breakpoint where sata 3gb in raid 0 is faster than one disk 6gb/s?

Can I do such a comparison?


If you're talking about physical disk hard drives then the RAID 0 is way way faster. In fact a single 6 gb/s HDD isn't even faster than the fastest 3 gb/s drives. SATA 6 gb/s for a physical disk is just useless really.

If you're talking SSD then stick w/ the 6 gb/s.
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a b G Storage
September 29, 2010 2:44:18 AM

^+1 mostly

Very few drives, even SSDs can deliver more than 3gb/s (375 theoretical MB/s) either reading or writing, except for the odd burst.

A 2 disk RAID 0 can, theoretically, deliver 375 MB/s times 2 (or 6gb/s)

Therefore, until drives can saturate the new 6gb/s (or even get over the 3gb/s SataII) a properly implemented RAID 0 will win.

At present SATA III is only necessary for future expansion, and, imho, SSDs will soon be faster than the hardware they serve and the bottleneck will move elsewhere.
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September 29, 2010 3:37:53 AM

I see. thanks for the answers.
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